Long-term (2001–2013) observations of water-soluble dicarboxylic acids and related compounds over the western North Pacific: trends, seasonality and source apportionment

Abstract To better understand the impact of East Asian pollutants on the molecular composition of marine organic aerosols, we conducted long-term (2001–2013) observations of water-soluble dicarboxylic acids and related compounds in total suspended particulate samples collected at Chichijima Island i...

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Autores principales:	Suresh K. R. Boreddy, Kimitaka Kawamura, Eri Tachibana
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/4ad521dfa2a542e1a4c9dce1b0aa431c
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spelling	oai:doaj.org-article:4ad521dfa2a542e1a4c9dce1b0aa431c2021-12-02T11:52:40ZLong-term (2001–2013) observations of water-soluble dicarboxylic acids and related compounds over the western North Pacific: trends, seasonality and source apportionment10.1038/s41598-017-08745-w2045-2322https://doaj.org/article/4ad521dfa2a542e1a4c9dce1b0aa431c2017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-08745-whttps://doaj.org/toc/2045-2322Abstract To better understand the impact of East Asian pollutants on the molecular composition of marine organic aerosols, we conducted long-term (2001–2013) observations of water-soluble dicarboxylic acids and related compounds in total suspended particulate samples collected at Chichijima Island in the western North Pacific (WNP). Seasonal variations of all the diacids and related compounds showed maxima in winter and spring and minima in summer, except for azelaic acid (C9), which maximized in summer to autumn. The overall annual concentrations of the total diacids, ω-oxoacids and α-dicarbonyls showed an increase during 2001–2013. We found a significant (p < 0.05) decadal increase in the inter-annual trends of pyruvic and glyoxylic (p > 0.05) acids, and methylglyoxal (MeGly). In contrast, phthalic acid (p < 0.05) and glyoxal (Gly) showed a decrease in their trends. We also found a significant decrease in the trend of the Gly/MeGly mass ratios. These results demonstrate that the enhanced concentrations of diacids over the WNP are majorly attributed to the aqueous-phase photooxidation of biogenic volatile organic compounds from East Asia followed by long-range atmospheric transport. Further, positive matrix factorization analysis showed a biogenic photochemical contribution (42%) was the dominant source of oxalic acid in the WNP.Suresh K. R. BoreddyKimitaka KawamuraEri TachibanaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-12 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Suresh K. R. Boreddy Kimitaka Kawamura Eri Tachibana Long-term (2001–2013) observations of water-soluble dicarboxylic acids and related compounds over the western North Pacific: trends, seasonality and source apportionment
description	Abstract To better understand the impact of East Asian pollutants on the molecular composition of marine organic aerosols, we conducted long-term (2001–2013) observations of water-soluble dicarboxylic acids and related compounds in total suspended particulate samples collected at Chichijima Island in the western North Pacific (WNP). Seasonal variations of all the diacids and related compounds showed maxima in winter and spring and minima in summer, except for azelaic acid (C9), which maximized in summer to autumn. The overall annual concentrations of the total diacids, ω-oxoacids and α-dicarbonyls showed an increase during 2001–2013. We found a significant (p < 0.05) decadal increase in the inter-annual trends of pyruvic and glyoxylic (p > 0.05) acids, and methylglyoxal (MeGly). In contrast, phthalic acid (p < 0.05) and glyoxal (Gly) showed a decrease in their trends. We also found a significant decrease in the trend of the Gly/MeGly mass ratios. These results demonstrate that the enhanced concentrations of diacids over the WNP are majorly attributed to the aqueous-phase photooxidation of biogenic volatile organic compounds from East Asia followed by long-range atmospheric transport. Further, positive matrix factorization analysis showed a biogenic photochemical contribution (42%) was the dominant source of oxalic acid in the WNP.
format	article
author	Suresh K. R. Boreddy Kimitaka Kawamura Eri Tachibana
author_facet	Suresh K. R. Boreddy Kimitaka Kawamura Eri Tachibana
author_sort	Suresh K. R. Boreddy
title	Long-term (2001–2013) observations of water-soluble dicarboxylic acids and related compounds over the western North Pacific: trends, seasonality and source apportionment
title_short	Long-term (2001–2013) observations of water-soluble dicarboxylic acids and related compounds over the western North Pacific: trends, seasonality and source apportionment
title_full	Long-term (2001–2013) observations of water-soluble dicarboxylic acids and related compounds over the western North Pacific: trends, seasonality and source apportionment
title_fullStr	Long-term (2001–2013) observations of water-soluble dicarboxylic acids and related compounds over the western North Pacific: trends, seasonality and source apportionment
title_full_unstemmed	Long-term (2001–2013) observations of water-soluble dicarboxylic acids and related compounds over the western North Pacific: trends, seasonality and source apportionment
title_sort	long-term (2001–2013) observations of water-soluble dicarboxylic acids and related compounds over the western north pacific: trends, seasonality and source apportionment
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/4ad521dfa2a542e1a4c9dce1b0aa431c
work_keys_str_mv	AT sureshkrboreddy longterm20012013observationsofwatersolubledicarboxylicacidsandrelatedcompoundsoverthewesternnorthpacifictrendsseasonalityandsourceapportionment AT kimitakakawamura longterm20012013observationsofwatersolubledicarboxylicacidsandrelatedcompoundsoverthewesternnorthpacifictrendsseasonalityandsourceapportionment AT eritachibana longterm20012013observationsofwatersolubledicarboxylicacidsandrelatedcompoundsoverthewesternnorthpacifictrendsseasonalityandsourceapportionment
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Long-term (2001–2013) observations of water-soluble dicarboxylic acids and related compounds over the western North Pacific: trends, seasonality and source apportionment

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